[Bug c++/101071] New: [9/10/11/12 Regression] ICE in gimplify_init_constructor, at gimplify.c:5228

[Bug c++/101071] New: [9/10/11/12 Regression] ICE in gimplify_init_constructor, at gimplify.c:5228

[gscfq@t-online.de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101071

            Bug ID: 101071
           Summary: [9/10/11/12 Regression] ICE in
                    gimplify_init_constructor, at gimplify.c:5228
           Product: gcc
           Version: 12.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: gscfq@t-online.de
  Target Milestone: ---

With file gcc/testsuite/g++.dg/cpp0x/variadic-alias2.C and option
-fno-elide-constructors, started between 20200308 and 20200412 :


$ g++-8 -c variadic-alias2.C -O2 -fno-elide-constructors
$
$ g++-12-20210613 -c variadic-alias2.C -O2 -fno-elide-constructors
z1.cc: In function 'void test_min_filter()':
z1.cc:97:3: internal compiler error: in gimplify_init_constructor, at
gimplify.c:5228
   97 |   (void)(computed{} = expected{});// compiles for identical types
      |   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
0xaec735 gimplify_init_constructor
        ../../gcc/gimplify.c:5228
0xaed305 gimplify_modify_expr_rhs
        ../../gcc/gimplify.c:5397
0xaf0bdc gimplify_modify_expr
        ../../gcc/gimplify.c:5759
0xae6b13 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc/gimplify.c:14079
0xaefdbc gimplify_target_expr
        ../../gcc/gimplify.c:6782
0xae6ae6 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc/gimplify.c:14476
0xae9448 gimplify_stmt(tree_node**, gimple**)
        ../../gcc/gimplify.c:6863
0xae7646 gimplify_cleanup_point_expr
        ../../gcc/gimplify.c:6605
0xae7646 gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc/gimplify.c:14472
0xae9448 gimplify_stmt(tree_node**, gimple**)
        ../../gcc/gimplify.c:6863
0xae99a1 gimplify_bind_expr
        ../../gcc/gimplify.c:1424
0xae74ca gimplify_expr(tree_node**, gimple**, gimple**, bool (*)(tree_node*),
int)
        ../../gcc/gimplify.c:14280
0xae9448 gimplify_stmt(tree_node**, gimple**)
        ../../gcc/gimplify.c:6863
0xaea46b gimplify_body(tree_node*, bool)
        ../../gcc/gimplify.c:15324
0xaea8bf gimplify_function_tree(tree_node*)
        ../../gcc/gimplify.c:15478
0x981ec7 cgraph_node::analyze()
        ../../gcc/cgraphunit.c:670
0x9847e7 analyze_functions
        ../../gcc/cgraphunit.c:1234
0x9851ad symbol_table::finalize_compilation_unit()
        ../../gcc/cgraphunit.c:2508

[Bug c++/101071] [9/10/11/12 Regression] ICE in gimplify_init_constructor, at gimplify.c:5228

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101071

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |9.5

[Bug c++/101071] [10/11/12 Regression] ICE in gimplify_init_constructor, at gimplify.c:5228

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101071

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|9.5                         |10.4
            Summary|[9/10/11/12 Regression] ICE |[10/11/12 Regression] ICE
                   |in                          |in
                   |gimplify_init_constructor,  |gimplify_init_constructor,
                   |at gimplify.c:5228          |at gimplify.c:5228

[Bug c++/101071] [9/10/11/12 Regression] ICE in gimplify_init_constructor, at gimplify.c:5228

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101071

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|10.4                        |9.5
            Summary|[10/11/12 Regression] ICE   |[9/10/11/12 Regression] ICE
                   |in                          |in
                   |gimplify_init_constructor,  |gimplify_init_constructor,
                   |at gimplify.c:5228          |at gimplify.c:5228
      Known to work|                            |9.3.0
      Known to fail|                            |10.1.0, 9.4.0
   Last reconfirmed|                            |2021-10-02
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed, also started to ICE in GCC 9.4.0.
Note the full command line needed to get the ICE is:
-fno-elide-constructors -O2 -std=c++14

using -std=c++11 the code does not ICE.
Also note in GCC 9.3 and before -fno-elide-constructors  -std=c++14 rejects the
code.

[Bug c++/101071] [9/10/11/12 Regression] ICE in gimplify_init_constructor, at gimplify.c:5228

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101071

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Started to ICE with r10-7542-gbcafd8748cf9eb83a9e71bf67c4e2a7c5c8f513c aka
PR91966 fix which has been backported to 9.4.

[Bug c++/101071] [9/10/11/12 Regression] ICE in gimplify_init_constructor, at gimplify.c:5228

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101071

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P2

[Bug c++/101071] [10/11/12/13 Regression] ICE in gimplify_init_constructor, at gimplify.c:5228

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101071

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|9.5                         |10.4

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 9 branch is being closed

[Bug c++/101071] [10/11/12/13 Regression] ICE in gimplify_init_constructor, at gimplify.c:5228

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101071

Jakub Jelinek <jakub at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|10.4                        |10.5

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
GCC 10.4 is being released, retargeting bugs to GCC 10.5.

[Bug c++/101071] [10/11/12/13 Regression] ICE in gimplify_init_constructor, at gimplify.c:5228

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101071

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |mpolacek at gcc dot gnu.org

--- Comment #5 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed by r13-2978, which came without a test so I'll add a new one.

[Bug c++/101071] [10/11/12/13 Regression] ICE in gimplify_init_constructor, at gimplify.c:5228

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101071

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The trunk branch has been updated by Marek Polacek <mpolacek@gcc.gnu.org>:

https://gcc.gnu.org/g:60fca1802a25034f49fa1e3769b3a5656f392e89

commit r13-5692-g60fca1802a25034f49fa1e3769b3a5656f392e89
Author: Marek Polacek <polacek@redhat.com>
Date:   Fri Feb 3 13:45:10 2023 -0500

    c++: Add fixed test [PR101071]

    As a happy accident, this was fixed by the recent r13-2978.

            PR c++/101071

    gcc/testsuite/ChangeLog:

            * g++.dg/cpp0x/variadic-alias8.C: New test.

[Bug c++/101071] [10/11/12/13 Regression] ICE in gimplify_init_constructor, at gimplify.c:5228

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101071

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|ASSIGNED                    |RESOLVED

--- Comment #7 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Fixed.  Doesn't look important to (try to) backport.